Quote:
Originally Posted by 350TSS
Slob: I think the theory is that with 6 cups and springs there is the possibility for the pressure plate to move outwards on its splines at an angle or more likely as the clutch is released and the pressure plate starts to bite on the stack of plates for the spring cups to wander around the post causing the pressure plate to cam into the splines on drive take up. By effectively connecting the cups together rigidly it limits that possibility. Probably that is complete bollox.
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On the other hand, I've seen it suggested that unequal pressures on the springs can promote some wobble and aid the un-pealing of the plates as the clutch disengages, and presumably help with a smoother engagement rather than an in-or-out action. Perhaps that concept hails from a time when men were men and their 'bike engines dribbled oil!
Nick